Belgium

From Visawiki - the Collaborative Guide to Visas

Belgium is part of the Schengen area.

Brussels is the capital of Belgium and of the EU. Many countries have embassies in this city. A lot of countries don't have embassies in neighboring countries such as the Netherlands and Luxembourg, so if you're a resident of these countries Brussels can sometimes be a convenient option for acquiring visas.

Some countries with embassies: Mali, Afghanistan, Tajikistan...